feat: add ko image

.concourse/pipeline.yml

@@ -14,17 +14,33 @@ resources:
     repository: caddy
     access_token: ((github-credentials.token))
 
+- name: ko-release
+  type: github-release
+  icon: github
+  source:
+    owner: ko-build
+    repository: ko
+    access_token: ((github-credentials.token))
+
 jobs:
-  - name: images
+  - name: caddy
     plan:
       - get: ci-images.git
         trigger: true
       - get: caddy-release
         trigger: true
-        params:
-          globs:
-            - caddy_*_linux_amd64.tar.gz
       - task: caddy
         file: ci-images.git/.concourse/tasks/caddy.yml
+        input_mapping:
+          repo: ci-images.git
+
+  - name: ko
+    plan:
+      - get: ci-images.git
+        trigger: true
+      - get: ko-release
+        trigger: true
+      - task: ko
+        file: ci-images.git/.concourse/tasks/ko.yml
         input_mapping:
           repo: ci-images.git

.concourse/tasks/ko.yml

@@ -0,0 +1,25 @@
+---
+platform: linux
+
+image_resource:
+  type: registry-image
+  source:
+    repository: gcr.io/kaniko-project/executor
+    tag: debug
+
+inputs:
+  - name: repo
+    path: .
+
+params:
+  GITEA_USER: ((gitea-credentials.user))
+  GITEA_TOKEN: ((gitea-credentials.token))
+
+run:
+  path: sh
+  args:
+    - -cex
+    - |
+      echo "{\"auths\": {\"https://code.icb4dc0.de\": {\"auth\" : \"$(printf '%s:%s' $GITEA_USER $GITEA_TOKEN | base64)\" }}}" > /kaniko/.docker/config.json
+
+      /kaniko/executor --destination code.icb4dc0.de/prskr/ci-images/ko:latest --context ko/

ko/Dockerfile

@@ -0,0 +1,4 @@
+FROM docker.io/alpine:edge
+
+RUN echo https://dl-cdn.alpinelinux.org/alpine/edge/testing/ >> /etc/apk/repositories && \
+	apk add -U --no-cache ko